For months, analysts and politicos have debated the question of delivering Western fighter jets to Ukraine.

Supporters argue that training and transfers should move forward immediately, and detractors warn of escalation concerns and urge a focus on other priorities within Ukraine’s war effort.

In the past couple of days there appears to be some movement on the matter.

Operators of the F-16 Viper multi-role fighter jet, including the Netherlands, have expressed a willingness to transfer their aircraft to Ukraine. A leaked report from the U.S. Air Force suggests that pilot training for the F-16 could be completed in as little as four months, although there are likely some questions about the effectiveness of the pilots trained.